LGS Geology – Rock formations present at each LGS site Warwickshire Local Geological Sites GeologicalPeriod Group FormationMembers LGS Ma Click for details on BGS Lexicon of Rocks Hover mouse for name – Click for details Quaternary 2.5 – present Severn and Avon Catchment Warwickshire Avon ValleyFrog HallPershore Sands & GravelsCropthorne Sands & GravelNew Inn Sands & GravelWasperton Sands & GravelBretford Sands & Gravel Albion Glacigenic WolstonDunsmore GravelOadbyWolston ClayThrussington Bytham Catchments Baginton Sand & Gravel Jurassic 142 -206 Great Oolite Chipping Norton Limestone Inferior Oolite Grantham Formation Northampton Sand Lias Whitby Mudstone Marlstone Rock Dyrham Charmouth Mudstone Blue LiasRugby LimestoneWilmcote LimestoneSaltford Shale Triassic 206 – 248 Penarth LilstockLangportCotham Westbury Mercia Mudstone Blue Anchor Branscombe Mudstone Arden Sandstone Sidmouth Mudstone Tarporley Siltstone Sherwood Sandstone Bromsgrove Sandstone Polesworth Hopwas Breccia Permian 248 – 290 Warwickshire Ashow Kenilworth SandstoneGibbet Hill Conglomerate Carboniferous 290 – 354 Tile Hill Mudstone SalopAllesleyWhitacre (Arley & Exhall)Keresley (Corley) Halesowen Etruria Pennine Coal Measures Uppper Coal Measures Middle Coal Measures Lower Coal measures Millstone Grit Devonian 354 – 417 Oldbury Farm Sandstone Ordovician 443 – 495 Midlands Minor Intrusive Suite Stockingord Shale Merevale Shale Cambrian 495 – 545 Monks Park Shale Moor Wood Sandstone Outwoods Shale Mancetter Shale Abbey Shale Purley Shale Hartshill SandstoneWoodlandsHome FarmJee’sTuttle HillPark HillBoon’s Pre-Cambrian 545 – Charnian Caldecote Volcanics Last Updated on 19 Apr 2021
